Quote:
Originally Posted by joe231
In the headlight relay mod, the relay is there to provide full battery voltage to the headlights without routing it through the headlight switch, which accomplishes brighter lights. It is the same for the window motors. You use the window switch to energize the relay to provide full battery power, which results in faster window operation. It has nothing to do with the wire size in the doors.
What you are referring to is practical, but it is not the window relay mod that the OP was asking about.
So it seems to me you and I are discussing apples and oranges
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Yes, apples and oranges. And they both have seeds.
The reason for the relay here is because the 73 fuseblock cannot handle the current draw generated by the power windows (in theory). The reason I suggested it is to protect the stock wire harness.
I guess I missed that mod question in the op. I don't see a "relay mod" helping in power windows because they came from the factory wired with 12ga. wire which is rated to 41A @150*C. There is minimal resistance there unlike headlights wired with 18ga. from the factory which are only good for 16A. The mod has everything to do with wire size, smaller wires resist current flow resulting in reduced voltage. That's why the mod includes using bigger wire for shorter runs = less resistance = less voltage drop. In my mind it would be better to ensure good connections throughout the system and/or just replace tired motors.
Of course this is IMHO and YMMV.
